/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/PartyBeaconHost.h
Finds the current team assignment of the given player net id. Looks at the reservation entries to find the player.
index of team assignment for the given player, INDEX_NONE if not found
int32 GetTeamForCurrentPlayer ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & PlayerId ) const